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  1. // SquareMatrix.h
  2.  
  3. #import <objc/Object.h>
  4.  
  5. @interface SquareMatrix : Object
  6. {
  7.     int numberOfRows, numberOfColumns;
  8.     id columnList;
  9. }
  10. - initRows:(int)rows ;
  11. - (float)elementAtRow:(int)row column:(int)column;
  12. - setElementAtRow:(int)row column:(int)column to:(float)floatValue;
  13. - transpose;
  14. - (BOOL) checkRow:(int)row column:(int)column;
  15. - printMatrix;
  16. @end
  17.